Audi A4 B8 A5 S5 8T Door Tweeter Speaker Rear Left Right N/O/S 8T0035399

Audi A4 B8 A5 S5 8T Door Tweeter Speaker Rear Left Right is an original audio equipment component designed for installation in the rear interior of Audi vehicles. Thanks to its precise fit for factory mounts and electrical installation, it serves as a direct replacement for the factory tweeter, allowing you to restore the proper sound quality of the audio system. This is a solution for users who expect consistency with the factory finish and acoustic standards.

Specifications and technical data

• SKU: 8T0035399
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0035399
• Substitutable numbers: 8T0035399, 8T0 035 399
• Location on the vehicle: Rear, Right, Left
• Category: Door Panels

Purpose and installation compatibility

The presented tweeter is an audio system component mounted in the rear part of the cabin, on either the left or right side. The design has been developed for Audi models from the A4 B8 and A5 / S5 8T generation families, which ensures:

• retention of factory mounting geometry in door upholstery or side panels,
• consistency with the vehicle's original electrical wiring,
• correct positioning of the speaker relative to the listener in the rear interior.

As a result, the installation process is straightforward, without the need for upholstery modifications or custom adapters.

Acoustic characteristics and role in the audio system

The tweeter is responsible for reproducing higher frequencies in the audio system, which affects the clarity of musical details and the precision of the soundstage. Using an original Audi component allows you to maintain:

• a consistent tonal balance between the front and rear of the cabin,
• uniform tuning with other audio system transducers,
• stable performance within the range provided by the factory amplifier or head unit.

For the user, this means restoring factory-quality listening without the risk of acoustic parameter mismatch typical of random universal replacements.

Integration with door upholstery and interior aesthetics

This item belongs to the Door Upholstery group, which emphasizes its close connection to the finish of door cards and side panels. The original form of the housing and speaker grille ensures:

• a consistent look with other Audi interior trim elements,
• proper fitment to the upholstery without gaps or tension,
• maintenance of the factory styling line of the doors and rear side panels.

Thanks to this, replacing a damaged tweeter does not disrupt the interior aesthetics, and the whole remains consistent with the manufacturer's original design.

Condition, origin, and benefits of using a pre-owned part

The offered speaker is a pre-owned part, sourced from an Audi vehicle disassembly. Choosing this solution allows you to:

• maintain the original component specification without interfering with the installation,
• optimize repair costs while maintaining factory build quality,
• limit the risk of fitment issues typical of non-original replacements.

For many premium car owners, using a pre-owned OEM element is a reasonable compromise between quality and budget.

Installation recommendations and selection of other components

When replacing the rear tweeter, it is worth paying attention to the condition of adjacent trim elements and the correctness of the upholstery mounting. In the case of expanding or refreshing the rear interior, it is a good solution to simultaneously check other audio transducers and door card mounting clips.

If you are planning a comprehensive repair or upgrade of the door zone in your Audi and need other elements from the same group, such as side panels, trim strips, or mounting covers, check the available parts in the Audi Door Upholstery category.

To better understand why original pre-owned components for premium segment cars are becoming an increasingly popular choice, it is worth reading the market analysis in the article Crisis in the new parts market? Why in 2026 pre-owned originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend, which discusses current trends and the benefits of such an approach to repairs.